Re: [RE-wrenches] Xantrex AC coupling

Tue, 01 Jun 2010 19:41:26 -0700

For some reason we have started to get a bunch if installs that required AC coupling due to long distance to ground mounted solar array and inverter from main house and battery inverter system.
 
Although we have tried several combinations of hardware, the Sunny Boy at the array and a Xantrex XW in the home with backup generator and batteries seems to be what most of our clients want.
 
We first started installing the Ac power relay design to cut solar inverter output based on high battery voltage when in stand-alone mode, but recently found out Xantrex was implementing into their software the out of sync 60 cycle mode to signal solar inverter to dis-connect from line like the Sunny-Island uses.
 
We were very excited about this as the power relays and high battery limit control is a pain to install and always a fear the client will shut off breaker that poweres the relay.  When we first mentioned this on the list, somebody sent us a link to a Xantrex installation notes on the subject which clearly indicates this feature is now in all new software, so we tried contacting Xantrex to see if there was an update to this docement as we could no longer find it on the ir web site.  The service technician told us last week that this feature was only in the software for the XW4548 and not the larger XW6048 which is the model we have been installing.
 
Whats the story - the old docements say it is a feature now, the service tech tells us its vaporware, and there is no longer any documentation on line that tells anything about this feature or how to implement it.
 
Jeff Yago
DTI Solar
 
 
 
   Jeff Yago, 
  NABCEP Certified
      DTI Solar
    P.O. Box 10
  4494 Lake View Road
Gum Spring Virginia 23065
  (p) 804.457.9566
  (f) 815.846.0677
email: jry...@netscape.com
  web: www.pvforyou.com
 
Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.


  Jeffrey Yago. P.E.,CEM
J.R. Yago and Associates,
  Consulting Engineers
      P.O. Box 10
  4494 Lake View Road
Gum Spring, Virginia 23065
    (V) 804.457.2113
    (F) 815.846.0677
web site: www.jryago.com



--- e...@ecosolarnow.com wrote:

From: "EcoSolar - Eric Andrews" <e...@ecosolarnow.com>
To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Portable Solar Trailer w/ intermittent Ground Fault
Date: Tue, 1 Jun 2010 12:45:21 -0700

It sounds like you have a single GVFX feeding a load center w/ Multi wire Branch circuits.  You will need an auto transformer on the OB power center to feed both L1 and L2.
You will also need to do the ground switching and neutral isolation that Steve mentioned.
Fyi, OutBack makes a mobile inverter that does the neutral isolation/grd switching, but it’s not a Grid tie inverter…
Eric R. Andrews
NABCEP Certified PV Installer
Eco Solar, Inc.
www.ecosolarnow.com
PO Box 5194
Klamath Falls, OR 97601
541-281-8252 cell
541-273-3200 office
Saving the World...  One Solar Panel at a Time!
From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Wayne Irwin
Sent: Tuesday, June 01, 2010 9:30 AM
To: Wrenches
Subject: [RE-wrenches] Portable Solar Trailer w/ intermittent Ground Fault

Hello Wrenches,

We have a 2KW portable unit with one Outback GVFX3524. Intermittently, we have a problem feeding GFI breakers.
Its the strangest thing, sometimes it trips GFI's and other times it doesn't. Aside from the possibility that some of the GFI's aren't wired properly we haven't been able to figure it out. We have it plugged into a GFI at the shop (which is wired properly) and there is no problem.

I thought there was a previous string on this issue but could not find it in the archives.
What do you recommend for grounding portable units and what recommendations do you have from personal experience?

Thanks!

Wayne Irwin
Director of Engineering
Pure Energy Solar International Inc.
State Licensed Solar Contractor
License # CVC56695
wa...@pureenergysolar.com
http://pureenergysolar.com
352 377-6527 Office
352 336-3299 Fax

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